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# the Apache License, Version 2.0 (the "License"); you may
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
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# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

module Elasticsearch
  module API
    module Cat
      module Actions
        # Shows information about currently configured aliases to indices including filter and routing infos.
        #
        # @option arguments [List] :name A comma-separated list of alias names to return
        # @option arguments [String] :format a short version of the Accept header, e.g. json, yaml
        # @option arguments [Boolean] :local Return local information, do not retrieve the state from master node (default: false)
        # @option arguments [List] :h Comma-separated list of column names to display
        # @option arguments [Boolean] :help Return help information
        # @option arguments [List] :s Comma-separated list of column names or column aliases to sort by
        # @option arguments [Boolean] :v Verbose mode. Display column headers
        # @option arguments [String] :expand_wildcards Whether to expand wildcard expression to concrete indices that are open, closed or both. (options: open, closed, hidden, none, all)
        # @option arguments [Hash] :headers Custom HTTP headers
        #
        # @see https://www.elastic.co/guide/en/elasticsearch/reference/master/cat-alias.html
        #
        def aliases(arguments = {})
          headers = arguments.delete(:headers) || {}

          body = nil

          arguments = arguments.clone

          _name = arguments.delete(:name)

          method = Elasticsearch::API::HTTP_GET
          path   = if _name
                     "_cat/aliases/#{Utils.__listify(_name)}"
                   else
                     "_cat/aliases"
                   end
          params = Utils.process_params(arguments)
          params[:h] = Utils.__listify(params[:h]) if params[:h]

          Elasticsearch::API::Response.new(
            perform_request(method, path, params, body, headers)
          )
        end
      end
    end
  end
end